Embroidery attachment for sewing-machines



(No Model.)

A. W. JOHNSON & J. P. LAVIGNE. EMBROIDERY ATTACHMENT FOR SEWING MAGHINBS. No. 329,564.

Patented Nov. 3, 1885.

In 001; fad/ 8 r4. PETERS Phnlo-Lflhognlphan Washington. D. c.

-ing drawings.

UNITED STATES PATENT OFFICE.

ALBERT IV. JOHNSON, OF NEW HAVEN, AND JOSEPH P. LAVIGNE, OF WVALLINGFORD, CONNECTICUT.

EMBROIDERY ATTACHMENT FOR SEWING-MACHINES.

SPECIFICATION forming part of Letters Patent No. 329,564, dated November 3,1885.

Application filed November 5, 1884. Serial No.147,201. (No model.)

To all whom it may concern.-

Be it known that we, ALBERT W. J OHNSON, a citizen of the United States, and J OSEPH P. LAVIGNE, a subject of the Queen of Great Britain, residing, respectively, at New Haven and at Wallingford, both in the county of New Haven and State of Connecticut,haveinvented certain new and useful Improvements in Embroidery Attachments for Sewing-Machines, of which the following is a specification, reference being had therein to the accompany- Our invention relates to improvements in that class of embroidery attachments that have arms crossing the line of stitching or path of the needle of the machine at each ascent of the needle alternately in opposite directions, for delivering the embroidery-threads upon the surface of the fabric to be ornamented; and its objects are to produce a simple device for efiecting apositive movement to these threaddelivering arms, and a single tension device for giving substantially a uniform tension at the same time to two embroiderythreads, whether of the same or of different sizes.

In the drawings,Figure 1 is a top view of the attachment complete, showing the course of the embroidery-threads from the spools to the ends of the thread-delivering arms. Fig. 2 is a side elevation of the attachment. Figs. 3 and 4 are an inclined section of a part of the attachment on the broken line :0 m, Fig. 2, showing the same parts in different positions. Fig. 5 is a vertical section of a part on the broken line 1; c, Fig. 1, and Fig. dis a perspective of a portion of the spool-holder and tension-spring.

Similar letters refer to similar parts throughout the several views.

The frame A is provided with a shank, G, by which it may be attached to a presser-bar, Z, of asewing-machine, and its front endis formed into a presser-foot, A, from which it inclines upward to its rear end. From one side of the frame a wing, H, is turned upward,and forms a support to which the bell-crank B is pivoted. At the end of the long arm of the bell-crank B is a fork, b, formed to engage with the needle-bar of a sewing-machine. To the short arm of the bell-crank B is hung a pawl, O,the

free end of which is pressed downward by a spring, a, secured to the bell-crank and made to engage with ratchet-teeth projecting upward around the edge of the uppersurface of the camdisk E, which is arranged 'to rotate in aplane parallel with the plane of the frame A. In the under flat side of the cam-disk E is a quadratic cam-groove, e, the center of the space inclosed by this cam-groove coinciding with the center of the disk. Its four angles are equidistant from this center, as are also its four sides, which curve inwardly toward the center. Projecting upward into the camgroove 6 are two cylindrical studs, k 70, the lower ends of which are securely fixed to the arms L M, upon which the cam-disk E rests, and which are attached by pivots t t to and rest upon the frame A,the studs in It being fixed to these arms between their free ends and the pivots t i. The post D, which operates as a pivot forthe cam-disk E to rotate upon, is firmly fixed at its lower end to the frame A. Above the cam-disk, around the post D, is a shoulder,between which and the disk a springwasher, F, is compressed to produce a desired amount of friction upon the disk and arms L M, upon which the disk bears. The upper end of the post D, being provided with asuitable opening, d, forms a guide for the embroidery-threads. To the rear end of the frame A is attached the spool-holder O by means of the lips h h, Fig. 6,which are turned under and made to clasp around the edges of the wing a. At the rear end of the spool-holder 0, one above and one below, and attached to it by a single pivot, are the spool-arms T T, for holding spools of embroidery-thread, extending in a horizontal planein opposite directions at right angles to the holder. These arms are prevented from turning upon their pivot in the direction in which the em broidery-threads are drawn from the spools by the lips 0 0, turned one upward and one downward from the edge of the holder; but they may be swung around in the opposite direction until they rest parallel with the holder. Resting upon the spool-holder O is a flat tension-spring, P, having a rib, p, struck across its front end, where it is somewhat wider than the spool-holder, so that the rib on the camdisk E causes thedisk to rotate oneprojects over at each side beyond the edge of the holder, the points of contact ofithe, spring 'with the holder being its rear endand the and into the spool-holder, for regulating. the pressure of the spring. The g'ui'de' s'tu'ils-rr,

projecting upward from the spool-holderO, one upon each side of the'rib p, operate as guides to the embroidery-threads it, One of these guide-studs passes through a hole in the tension spring P, thereby preventing the spring from turning upon the adjusting screw S.

The threading and operation of our em broidery attachment are'as follows: The spools of embroiderythread are "placed uponth'e spool-arms T T, fro-m which the-threads-are drawn under the-rib p of the tension-spring and between theguide-studs r r from opposite sides, so that they will be separated by the studs both in front and in the rear-of and' mad-e tocross each other directly under the central part of the rib p betweenitan-d the-spoolholder 0, so that the tension-spring'willpress the two threads together, one upon -the-other, against the su rface of the spool holder, whereby a suitablete nsion pressure is given to both threads'wheth'er of equal or unequal sizes, the

desired pressure upon the threads being-obrained byturnin-g the adjusting-screw S, From thetension device the threads pass through the opening d in the-.p'ostD,-where I they separate, one passing-through the guideloop men the armL and-down through the eye a atits extreme end; the other passing in like manner through the -guide-loopfim -and eye nof the'ar-m When the-ar-ms L Mareseparated to their full extent, asshown-in Fig. 4,'it-wi1l be observed that the studs-'k-k occupy positions on a line crosswise of the attachment in twoopposite angles of-the camgroove 6- in the cam-disk E. Now, at the first ascent of ith'e needle-bar of the machine the end of 1 thefbell-erankB- connected therewith is raised, whereby the short-ar-m-to w-hichthe pawl C is hung is carried forward, and-the pawl engaging withone of the 5 ratchet-teeth eighth'ofa revolution, which brings the cam;-

' groove e "therein to the (position shown in Fig. 3. The studs-7c k, rn nning-i-n-the camgroove, are d-rawn by iis rotary movement in toward; the Center-of-the disk until they occupy positions in the centers 'of two cp-pm site inwardly-curved. sid-esof the ca-megroove, whereby thearms L M,- to which these studs are fixed, turning on their ,apivots t'pa're drawn togetherat their free ends sothatthey crossth'e line of-stitch-ing in -'opposi-te"directions and overlap-each othe'r. As the needl-ebar'de.-

scends, the cam-disk E and "arms L M remain f stationary, whi-le'the pawl O- is-drawn=back ward-to itsfirst'position. At the next iascent of theneedle-bar the {cam'disk is againscaused to rotate, as before, one-eighth of arevol uticti fr bringing the cam-groove again into the positio'ir shown inFig. 4, by which movement the studs k k are thrown outward into two opposite angles of the cam-groove, causing the arms L M to separate at their free ends, and, revcrossing the line of stitching, swing back to thepo'sitionfirst above described.

A= continuance of the operation would be a.

one-eighth of a' revolution, and by the action of the quadratic cam-groove therein upon the studs k k the arms L M are caused to take alcam or canr-and ratchet for operating sai'd arms; -nor do we claim, broadly, =s'pool-carrying 'ar-ms; pivoted to a holder or fram e, forwe are aware that prior to our invention such combinations have-beenmade, but

Whatwe --do claim as our invention,-' an-d desiretosecure' by Letters-Patent, is' 7 1. In an embroidery attach ment, the-"coinbinationofthe vibrating arms L M, the rotating cam-disk E, held; infrictional contactwith saidarmsby the spring-washer F, thetpivotpost 1), forming a guidefor the embroiderythreads, the pawl- G, 'and bell-crank Bywhen 'constructed an-d "arranged su bstan tially'asdescribed and for the; purpose set-forth.

2. "In anembroidery attachment a cam-disk --arranged to rotate in aplane parallelwiththe plane of the frame, having initsflat side a quadratic cam groove, 'the'angles of-whieh -are equidistant from the center of the disk,;i-n-com;- binationw-ith twoar-ms for delivering the embroidery threads, separately. pivoted to th'e frame,-. arranged to vibrate between the frame and cam disk, and held in frictional-contact with both bya spring, the said armsbei'ng provided with cylindrical studs engaging with an'd arranged to run in'said cam-groove; whereby a rotary movement-of thecatn-dish imparts a-vibratorymotion to the'arms, substantially B'S' Q'GSGT-ibGd; and set forth. 7 I 'I-man embroidery. attachment, theconrbinatironof the spool-holder .0; adjustabletension spring "P, secured. thereto, z'providedwi-th a eross rih-zp, constructed. to bearupon' and press the em'broidery=threadsagainst the surface-of said spool-holdctyand guide-'studs M",

of said rib, whereby the embroidery-threads vent said spool-arms from turning on their are made to cross each other directly under pivot in the direction in which the embroidthe central part of said rib, between it and the ery-threadsare drawn therefrom, substantially surface of said spool-holder, substantially as as described. 5 and for the purpose set forth.

4. The combination of the tension-spring Y P, provided with a cross-rib, p, guide-studs 1- 7', spool-holder O, with spool-arms T T, pivoted W'itnesse's: thereto, and lips o 0, formed upon said spool- EZRA B. DIBBLE, 1o holder, constructed to operate as stops to pre- FRANK GALLAGHER. 

